标签: checker

CheckerProductGuide_CNChecker视觉传感器产品指南智能视觉传感器想要寻找一种防止生产流程出错的最简便且经济的方式？最早的Checker视觉传感器就属于这个类别，它结合了光电传感器的优势并且还增加了多种功能，为生产商和机器制造商提供了便利。今天，Checker已经发展成为一个全面的产品系列……

【应用手册】ImplementingCRCCsinAlteraDevicesRedundantencodingisamethodoferrordetectionthatspreadstheinformationacrossmorebitsthantheoriginaldata.Themoreredundantbitsyouuse,thegreaterthechancethatyouwilldetecttransmissionerrors.Forexample,a16-bitincreaseindatarecordlengthmisses1errorin65,536,whilea32-bitincreasemissesonly1errorinover4billion.Althoughtheseoddsarefavorable,undetectableerrorscanstilloccur.Thenatureofcommonerrorsvariesdependingonthetransmissionandstoragemedium,butundetectableerrorscanbecausedbyoccasionalisolated-changedbitsorshortburstsofmultiple-changedbits.Tominimizeundetectableerrors,youcandistributethedatasothatitislesslikelythattransmissionerrorsresultinavalidencodingofanalternatesetofdata.Cyclicredundancycodes(CRCs)areafavoredtypeofredundantencoding.Cyclicredundancycodecheckers(CRCCs)checkfordifferencesbetweentransmitteddataandtheoriginaldata.DatatransmissionapplicationsuseCRCCsextensively.Forexample,theAsynchronousTransferMode(ATM)specificationrequiresaCRCCthatisimplementedacrosstheentirepayloadtoensuredataintegrity.ImplementingCRCCsinAlteraDevicesOctober2005ver.2.1ApplicationNote049IntroductionRedundantencodingisamethodoferrordetectionthatspreadstheinformationacrossmorebitsthantheoriginaldata.Themoreredundantbitsyouuse,thegreaterthechancethatyouwilldetecttransmissionerrors.Forexample,a16-bitincreaseindatarecordlengthmisses1errorin65,536,whilea32-bitincreasemissesonly1errorinover4billion.Althoughtheseoddsarefavorable,u……